Sintering machine



Aug. 26, 1930. g, MACE 1,773,916

SINTERING CHINE 2 Shee s-Sheet l Filed May I 25, 1928 INVENTOR.

Aug. 26, 1930. c, 1,773,916

' SINTERING MACHINE Filed May 25, 1928 2 Sheets-Sheet 2 INVENTOR.

{able igniter 1s as'soe1ated with'a sintering the endsof'theuprightsafford supports forties;

" 10 hearth at an inclineto faoilitate the removal 4r Other *obj'eetsreside i a-detailed construc- One of the shafts 1 rectioncgf the'arrowA; of Figure: 1-, .and fillerzcap35 isprovidedatthe topof the tank 4 neFigure 3 isa section t'akenonthe line to replenish the fuel therein.Thev motor 30: 1 5

5-30 gtion-wi'th a flue '60 in turn-connected with e flfanrandathe fueltankcon'stitute.theiuel oila"o v i I is exhausted from the'suetionbox,]Channel? i h c g i lghihe bfit rpipe, N

I "bfportionofthe'suction'box, together'with the i I The a P m S;1 atits hill-lei; "arched .roQf 4:5 anda: hollQwfa ron'fLShPfu Y ,mg c 9 e zs .ope e s.u u ln p mt m r wThe'rw'allsoftthe hood are preferablyrcom-gjs mgran -r ne -the d sc erg zbfthespos dsofefirebrick'fooyeredexteriorlygby '7 f? me tedsor s t dme lel'the rs .o.metarplams andrinterpg sed'shee v f'ainon i Thei gates 14 are mountedLon a shaft l5 conduetingf substance-such asjwhat i'sk' l i that ha'sasquarediend 16.iorthefapplieationfiinethe tradeas. Sire-eel, r a j v v0fof+a crank to open'the gatessimultane'ously -Y;; The wall opposite?to.ithat;.from;,whieh the 3oo" PM A 6 1936 I .1',773,916

I onmmir '3, new, or DE VER; ICOTQORADO" d i V smrnnmokrrieonriin IApplleation flled ma y 25; 1928. Serial fno.'2so ,4e2.

- My invention relatesto apparatus for the by rotation of heshaftl fiuoted fasteners f roastingandsinteringof ores, and it has for 17 holdthe gates in their closed positions. h its principal object theprovision of a roastwFastened at the upper ends oflthe uprights'ingand-smterlng apparatusjin which a mov- 8 are channel'bars"18, whichtogether with hearth for vthe main object of igniting a rails 20iextendinglengthwise. of the appachargeuponthe hearthover apredetermined'ratus' The structuralbars 7 8 'and18,'1asextent'thereof." Y g I 7'sembled as shown :and described, to ether Another objectPis toprovide asintering l constitute a frame that-supports and races the Walls of theapparatus. I 00' ofsinter." Y 7 v Traveling on the rails 20'isa wheeledcar 1 A'tfurther object isflto provide means'for'I-riageQLmThe wheels ofthe carriage-have thequick ignitionofinaterial upon a defined,beenrdesignated'by the number--22 and are 1 areaof th'e hearth; mountedon shafts'23 w t p 's extended beyond the 05 tion, which will more-fullyappear in the trackand carries a hand wheel24; for moving T eourse oftheffollowingfdescription. I the carriage. fl V r I Inthedravifing's";in which like parts are On the'earriage'is an ignitercomprisingoa similarly designated throughout the Varioussfuel't'ankg2'9, amotor 30, afan 31- operate y 7 p I 1 -the jfn'lotor,vandl'a hood, aeh of which will'n70 Figure 1- isa partly'brokenplanViGWOf an hereafter be more. fully described; f s I embodimentoffmyinventiony- L i 1 g z'lheifuel vtank 29*isheldonvoross bars33i fFigure 2, is an elevationlooklng the di- ,-of the carriage by meansoffclamps 34. A V

1 oft-Figure 1. p p t is bolted to*a'.fioor 36 of-thecat. Theifan it t,i, Referring" more "specifically to the drawg 31' is vpreferalolymountediidirectlyupon the l ings, the reference numeral 5freprese'nts arotQrshaftBZofthe motor;;.;Conoentrie,pipes suction box having outlets6101', its conned-j v38 :an'dk39 connecting 'respeetivelywith thesuction means (not hown whereby the air burner oftheiigniterr-f; eirons/7 brace thesuc'tion box at-its -bottom; r t ml hee uppli dg hroubg h i Angle irons spmid verticn braces at thej p aa d t endso't PlPQ Iq lnt1y1P TQ'-- I .3y-1dei ap- 'nozzle; atwh ehi the atom zed 116115185,vignitedif- 1;; j q o p JAivaplve 40 controls the fuelsupply throughthe r fuel conduit 3 91 and a=tovalve;z 41 regm lates the,,air supply inithexoonduit 38,51

I On supports 9jrunning longitudinally of i the suction loo rest' grate"bars 10 inclined ,from the horizontal. Alining 12 inthe upper a ;The"nozzle:32v-projectsintofan 0pening;42;; l9 o fd b fi vFm P f -fffelafmtn -of the:aforerhkantionedhood;43 which corno 5 Biroaste orlsm erei prises; end walls 45,"andi'side'waHs {15%g'an f j 1 I 9 and gates a uofthe pp ratus ing downwardly frornone of t e end-wal apron projects,has interiorly a baflle 50 to deflect the heat and gases to the spaceheneath the apron which is provided with openings 48 for the admissionof oxygen to the roasting-chamber.

In practice, the charge of fuel on the hearth will vary considerably indepth and since'it is highly desirable that the hood be as close to thecharge as possible and still clear it, the hood must be adjustable as toheight. 7

The element provided to effect this adjustment comprises parallel shafts51 and 52 mounted in bearings on the cross bars 33 of the carriage. Theshaft 51 projects beyond the track and has a hand wheel 54 at itsprojecting end. The shafts carry aligned sprocket wheels 58 and 59connected by a chain 61 by which the shafts 51 and 52 r are caused torotate simultaneously in the same direction when the hand wheel 54: 1s

- turned.

urner of the igniter element is lit, the hood is adjusted so that it isin close proximity to the charge, and the carriage on which the hood andthe igniter are supported, is propelled along the track by means of thehand wheel 24.

The nozzle of the burner slants upwardly in the opening 42 to projectits flame along the arch and the bafiie directs the flame downwardly andacross the hearth under I: both the arch and the apron and toward andthrough the ore bed on the hearth, as indicated by the arrows in Figure3. The openings in the apron afford an entrance for air 4 toIprovideoxygen for the burner.

V will be seen that by movement of the carriage, which may be eithercontinuous or intermittent, successive portionsof the ore bed areprogressively ignited and that in this manneran ignition element ofcomparativel small proportions and corresponding 1 simple constructionmay be employed to ignite the charge on a hearth of any desired length;

After the carriage has traveled the length of the hearth, which may beconsiderably 'longer than shown, the ores have been ig- -nited overtheir entire extent, and they are allowed to burn until the roasting orsintermg operation is complete and the ore is formedint'o anagglomerated mass or cake.

The suction box 5 and the suction means with which it is connected,create a draft to draw the heat and gases of combustion through thegrate bars, that is continued throughout the operation.

lVhen the agglomeration of the ore has taken place, the fastenings 1'?are moved to release the gates l t and the gates are opened by rotationof the shaft 15 as described. A slice bar may then be inserted under thecake to release it'from the hearth and allow it to slide through one ofthe gates and into any suitable receptacle.

It will be seen from the foregoing that a very practical and efficientapparatus for roasting or sintering crushed or line ore, concentrates,flue dust, bag house fumes, or any fine material, has been provided.

Details of construction of tie apparatus may be varied considerablywithout departing from the scope and spirit of the present invention andI do not wish to be limited to the construction shown and describedexcept as specifically stated in the hereunto appended claims. 7

What 1 claim and desire to secure by Letters Patent is:

1. In apparatus of the character described, a hearth, a burner, and ahood for directing the flames of the burner toward a charge on" thehearth, comprising in spaced relation to the hearth, an arched bodyportion and a laterally projecting apron apertured for the admission ofair. v j

2. In apparatus of the character described; a hearth, a burner and hoodfor directing the flames of the burner toward a charge on the hearth,comprising in spaced relation to the hearth, an arched body portion, alateral- .ly projecting apron apertured for the admis-' sion of air anda baffle opposite the apron to direct the flames into the space beneaththe same. y 7

3. In apparatus of the-character described, a laterally inclined hearth,a surrounding wall for the hearth, having a normally closed openingatthe lower edge of the same for the removal of burnt material, and anignition element movable along the hearth, including a burner and a hoodrestricting the" action of the burner to a portion of the hearth beneaththe same, exclusive of the other portion of the hearth.

4. In a sintering furnace, a hearth, a hood covering a portion of thehearth and compris ing an expansion-chamber and a space of relativelysmall depth connected at the lower portion of the chamber to restrictheat to a region immediately above an ore bed on the hearth, and aburner for the projection of roof and a space of relatively small depthconnected fltthe lower portion of the chain- 7' her to restrictheat'to'a region immediately above an ore-bed on the hearth, and a burnerdisposed to direct flames alongthe arched roof of the expansionchamberfor theirdeflection toward and into'the space of small depth.

6. In a sintering furnace, a laterally'in-v clined hearth for thesupport-ofani ore bed,

ignition means forv the ore bed, an enclosure for the hearth, having anopening at the lower edge of the incline for the discharge bygravcakes,-anda door closing the ity of sintered opening.

7.In a sintering furnace, a laterally in-'- clined hearth for thesupport of an ore'bed, i

ignition means for the ore bed,'an enclosure vfor the hearth having aplurality of openings r I. i

' at the lower edge of the. incline, for the'dis I means for varying theelevation of the hood .7

above the hearth'toiaccommodate ore-beds of 7 charge by gravity ofsinteredicakes, doors closing the openings, 'nd imechanismzifor vsimultaneous opening ofthe doors.

8. In a sintering furnace, a laterally inclined hearth, an enclosure forthe hearth,

1 having means for the discharge of 'sintered cakes at thefoot of itsincline, a hood covering the hearth laterally along a portion of its)longitudinal extent, and a burner in the hood, the hood being movablelengthwise-of the I similar portions of thel hearth to cover otherhearth. v v 9. In a sintering furnace, a.hearth,--a hood covering aportion of the hearth and movable I lengthwise of the hearth to coverotherrsimilar portions of the same, a burner in the hood,

means for the propulsion of the. hood, and

different heights.

10. In a sintering furnace,ahearth, a hood 7 covering a portion of thehearthand eomi prising anfexpansion-chamber, a space of relativelysmalldepth connected at the lower I portion of the chamber to restrictheat. to 'a 1 region immediately above an ore-bed 'on the hearth, andabalfie opposite the space to direct flames into the same, and a burnerfor a p the projection of flames into the expansion chamber. 7

, In testimony whereof I have aflixe'dmy I oLEMEN j H- MACE! y '1'signature.

